Fig. 1From: Can proportional ventilation modes facilitate exercise in critically ill patients? A physiological cross-over studyExample of a patient ventilated with Neurally Adjusted Ventilator Assist (NAVA) while performing exercise with the cycle ergometer (MOTOmed Letto 2, RECK-Technik GmbH and Co. Betzenweiler, Germany). Oxygen consumption is measured through indirect calorimetryBack to article page